EP0775989A2 - Dispositif de contrôle de pièces de monnaie et méthode associée - Google Patents

Dispositif de contrôle de pièces de monnaie et méthode associée Download PDF

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Publication number
EP0775989A2
EP0775989A2 EP96116175A EP96116175A EP0775989A2 EP 0775989 A2 EP0775989 A2 EP 0775989A2 EP 96116175 A EP96116175 A EP 96116175A EP 96116175 A EP96116175 A EP 96116175A EP 0775989 A2 EP0775989 A2 EP 0775989A2
Authority
EP
European Patent Office
Prior art keywords
coin
coil
ratio
optical sensor
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96116175A
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German (de)
English (en)
Other versions
EP0775989A3 (fr
Inventor
Steven Michael Costello
Joe Lee Young
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coin Acceptors Inc
Original Assignee
Coin Acceptors Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coin Acceptors Inc filed Critical Coin Acceptors Inc
Publication of EP0775989A2 publication Critical patent/EP0775989A2/fr
Publication of EP0775989A3 publication Critical patent/EP0775989A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation

Definitions

  • This invention relates generally to vending machines and more particularly, to coin detection devices and coin detection methods utilized in such vending machines.
  • Known coin detection devices utilize various coin detection methods including optical size detection and metallic characteristic detection. Two such coin detection devices are those disclosed in U.S. Patent No. 4,625,852 and U.S. Patent No. 4,646,904. It is also known to combine optical size detection and metallic characteristic detection in a single coin detection device in order to achieve greater coin detection accuracy. However, due to the similar metallic content of some coins, it is difficult to distinguish between such coins using metallic characteristic detection. In such cases, even in coin detection devices incorporating both types of coin detection, optical size detection must sometimes be relied upon to make the necessary distinction. Unfortunately, in some cases, particularly in the case of ringed coins which are coins including an interior portion formed from a first material and a surrounding outer portion formed from a second material, coins of various denominations may have similar optical sizes making it difficult to distinguish between such coins.
  • An object of the present invention is to provide a coin detection device and associated method for distinguishing between coins of similar metallic content.
  • Another object of the invention is to provide a coin detection device which minimizes losses resulting from inaccurate validation of coins of similar metallic content.
  • Another object of the present invention is to provide a coin detection device which utilizes magnetic size detection in combination with optical size detection to effectively distinguish between different coin types.
  • Yet another object of the present invention is to provide a method of coin detection which can be implemented using known coin validation and/or detection devices.
  • a coin detection device which, in one embodiment, includes first and second spaced optical sensors positioned along a coin path and capable of detecting movements of a coin thereby.
  • the optical sensors may be configured such that a signal from each optical sensor changes from a high (HI) state when there is no coin detected by the optical sensor to a low (LO) state when a coin is detected by the optical sensor.
  • HI high
  • LO low
  • Such a construction is disclosed in U.S. Patent No. 4,646,904 which is assigned to the assignee of the present invention and the disclosure of which is incorporated herein by reference.
  • the optical sensors could also be configured to move from a LO state during non-detection to a HI state during detection.
  • a processing means such as a microprocessor, is connected to the optical sensors so as to receive signals therefrom.
  • the processing means is also operable to establish an optical size time which runs from when the coin is detected by the first optical sensor to when the coin is detected by the second optical sensor. Further, the optical size time preferably runs from when the coin is first detected by the first optical sensor to when the coin is last detected by the second optical sensor.
  • the present invention could be implemented with only one optical sensor.
  • the coin detection device also includes a coil which is energizable to produce an electromagnetic field in the region of the coin path.
  • the coil is part of a ringing circuit which is a modified version of the ringing circuit described in U.S. Patent No. 4,625,852 which is assigned to the assignee of the present invention and the disclosure of which is incorporated herein by reference.
  • the coil could be a part of numerous known coin detection apparatus or circuits such as those which utilize a coil or inductor as part of an oscillator circuit as disclosed in U.S. Pat. Nos. 3,870,137; 3,918,563; 3,918,564; 3,918,565; 3,952,851; 3,966,034; and 4,151,904.
  • the processing means is connected to the detector means and is operable to establish a magnetic size time which runs from when the coin enters the region of the coil and begins to affect the field thereof, to when the coin leaves the region of the coil and no longer affects the field thereof.
  • the processing means is also operable to establish either a magnetic to optical size ratio which is the ratio of the magnetic size time to the optical size time, or the reciprocal thereof.
  • the established magnetic to optical size ratio is then evaluated in light of stored predetermined maximum and minimum ratios for the acceptable coin type or types to determine if the established magnetic to optical size ratio falls within the maximum and minimum ratios for one of the coin types. If the established magnetic to optical size ratio falls within predetermined maximum and minimum values for a valid coin, then the tested coin passes the magnetic to optical size ratio test.
  • the coin detection device of the present invention provides a magnetic to optical size ratio test which is effective in distinguishing a smaller size, lower denomination coin from a larger size, higher denomination coin even when the smaller coin has been modified to have the same optical size as the larger coin.
  • This magnetic to optical size ratio test can be utilized alone or in conjunction with other know tests for detecting and validating coins.
  • a first optical sensor 10, a second optical sensor 12, and a coil 14 are positioned along a coin path 16.
  • the coil 14 is positioned intermediate the optical sensors 10 and 12, however, the coil 14 could also be positioned either to the left of optical sensor 10 or to the right of optical sensor 12.
  • Six positions of a coin 18 traveling from left to right along the coin path 16 are depicted as dashed line circles designated one (1), two (2), three (3), four (4), five (5), and six (6).
  • Position one (1) represents the position of the coin 18 when the coin 18 is first detected by the first optical sensor 10 and position two (2) represents the position of the coin 18 when the coin 18 is last detected by the first optical sensor 10.
  • times t 1 and t 2 which represent the points in time when the coin 18 will be located at positions one (1) and two (2) respectively.
  • the coin 18 is first detected by the second optical sensor 12 and at position six (6) and time t 6 the coin 18 is last detected by the second optical sensor 12.
  • the coin 18 is entering the region of the coil 14 and at position four (4) and time t 4 the coin 18 is leaving the region of the coil 14.
  • Position three (3) is representative of when the coin 18 begins to interact with, or reaches a predetermined level of interaction with, the field of the coil 14, and position four (4) is representative of when the coin 18 is no longer interacting at the predetermined level, as may be indicated by various known methods, such as by a change in an output signal of a detection circuit (not shown).
  • the present invention utilizes a magnetic to optical size ratio to distinguish between different coins and between valid coins and slugs.
  • a magnetic to optical size ratio to distinguish between different coins and between valid coins and slugs.
  • the reciprocal of the magnetic to optical size ratio could be used without departing from the scope of the present invention, in which case the ratio would be appropriately termed an optical to magnetic size ratio.
  • the magnetic to optical size ratio is a ratio of the magnetic size time to the optical size time.
  • the magnetic size time is the time the coin 18 takes to move from position three (3) to position four (4), or (t 4 - t 3 ) as shown in the timeline of Fig. 2.
  • the optical size time is the time the coin 18 takes to move between the two optical sensors 10 and 12, preferably between positions one (1) and six (6), or (t 6 - t 1 ). Further, although not required, it may be desirable to multiply the ratio by a constant K.
  • time t 3 is dependent upon the position of the leading edge of the coin 18 while time t 4 is dependent upon the position of the trailing edge of the coin 18. Therefore, the travel time (t 6 - t 1 ) between positions one (1) and six (6) is preferred for purposes of the optical size time or denominator because time t 1 is similarly dependent upon the position of the leading edge of the coin 18 and time t 6 is similarly dependent upon the position of the trailing edge of the coin 18. Due to this symmetry between the two time periods, (t 4 -t 3 ) and (t 6 - t 1 ), a ratio of the two is substantially independent of the speed of the coin.
  • the magnetic to optical size ratio is most effective for distinguishing between coins when the travel time (t 6 - t 1 ) is used as the optical size time in the denominator.
  • the particular travel times utilized in the magnetic to optical size ratio can be established by the coin detection device 20 illustrated in block diagram form in Fig. 3.
  • the coin detection device 20 includes a processing means 22, such as a microprocessor, connected to an optical detection means 24 which includes the optical sensors 10 and 12 illustrated in Fig. 1.
  • a field generating means 26 which includes the coil 18 of Fig.1 and may comprise various known field generating means commonly used in coin detection devices.
  • a detector means 28 is associated with the processing means 22 and the field generating means 26 such that the detector means 28 is able to detect when the coin 18 enters and leaves the region of the coil 14 and its associated field.
  • the detector means 28 utilized may include detector means such those used in known coin detection devices.
  • the processing means 22 is also connected to a memory means 30 such that the processing means 22 is capable of retrieving stored information therefrom.
  • the coin detection device 20 establishes the magnetic to optical size ratio described above with reference to Figs. 1 and 2, and the established magnetic to optical size ratio is evaluated in light of predetermined maximum and minimum ratios for acceptable coins, which maximum and minimum ratios are stored in the memory means 30.
  • the coin detection device 20 may be configured to compare the established magnetic to optical size ratio with one set of a predetermined maximum ratio and a predetermined minimum ratio for a single coin type or the coin detection device 20 may be configured to compare the established ratio with a plurality of sets of predetermined maximum and predetermined minimum ratios for a corresponding plurality of coin types. In either case, if the established magnetic to optical size ratio falls between the predetermined maximum and minimum ratios for a particular valid coin type, then the coin being tested is accepted as satisfying the magnetic to optical size ratio test for that particular coin type.
  • Fig. 4 illustrates a schematic circuit diagram of the optical detection means 24, the field generating means 26, and the detection means 28 illustrated in Fig. 3. This particular embodiment is intended for illustration purposes only and it is understood that the implementation of the magnetic to optical size ratio test is not necessarily limited to the Fig. 4 embodiment.
  • the circuitry to the right of line 31 is indicated as prior art.
  • the processing means 22 and the memory means 30 are not considered structurally new, the programming of the processing means 22 and the information stored in the memory means 30 and used by the processing means 22 result in a novel coin detection device.
  • the optical detection means 24 includes the optical sensors 10 and 12, each forming an optical coupler pair including a light emitting diode 32 or 34 and corresponding phototransistor 36 or 38. Each light emitting diode 32 and 34 is positioned on one side of the coin path 16, shown in Fig. 1, and each corresponding phototransistor 36 and 38 is positioned on the opposite side of the coin path 16.
  • the optical coupling of each pair places the phototransistor 36 or 38 in a conductive state so that a HI signal is transmitted to the processing means along lines 40 or 42.
  • a coin passes between an optical coupler pair the optical coupling between the pair is broken and the phototransistor 36 or 38 switches to a non-conductive state such that a LO signal is transmitted to the processing means 22.
  • each optical sensor 10 and 12, or optical coupler pair is capable of detecting when a coin passes therebetween.
  • the processing means 22 is programmed to utilize the signals from the optical sensors 10 and 12 to establish the optical size time described above.
  • the field generating means 26 includes the coil 14 connected in parallel with a capacitor 44 to form a tank circuit 46.
  • the input of the tank circuit 46 is connected to a power supply means 47.
  • the circuit illustrated in Fig. 4 is a modified version of the circuit illustrated and described in Fig. 3 of U.S. Patent No. 4,625,852.
  • the tank circuit 46 is connected to both an output monitor lead 48 and through a resistor 50 to a driver means 52 whose input is connected to a control link 54.
  • the output of the driver means 52 will go HI causing the tank circuit 46 to be interrupted in such manner that a damped wave output signal is produced on monitor lead 48.
  • the output monitor lead 48 is connected to the positive input (+) of a voltage comparator 56, the negative input (-) of which is connected to a reference lead 58 which in turn is connected to the output of a digital to analog converter 60 such that a controllable reference voltage is applied to the negative input (-).
  • the output 62 of the voltage comparator 56 is connected to a positive voltage source through a pull-up circuit 64 so that whenever the voltage at the negative input (-) is less than the voltage of the positive input (+), a HI signal is ensured at the output 62.
  • the tank circuit 46 is rung so as to provide a damped wave output signal as described above, the damped wave signal is compared against the reference voltage and the output 62 is fed into a counter 66.
  • the reference voltage can be chosen such that when the counter 66 counts a predetermined number (m) for a ringing operation, the count number (m) is indicative of the coin 18 having entered the region of the coil 14 or of the coin 18 having reached a predetermined level of interaction with the field of the coil 14. Similarly, when the coin 18 leaves the region of the coil 14 the count for a ringing operation will no longer reach the predetermined count number (m). Thus, the coin detection device 20 is able to detect when the coin 18 enters the region of the coil 14 and when the coin 18 leaves the region of the coil 14.
  • the reference voltage and/or count number (m) may be varied as desired to detect different levels of interaction between the coin 18 and the coil 14.
  • tank circuit 46 With respect to the ringing of tank circuit 46, it is understood that the detection of a coin by optical sensor 10, shown in Fig. 1, could be utilized to initiate a series of ringing operations. However, the tank circuit 46 could also be continuously rung regardless of whether or not a coin is traveling along the coin path 16.
  • the processing means 22 is operable to establish the magnetic size time described above. Once both the magnetic size time and the optical size time have been established, the processing means 22 then establishes the magnetic to optical size ratio and evaluates the ratio in light of the predetermined maximum and minimum ratios stored in the memory means 30.
  • Fig. 5 illustrates a first ringed coin 68 and a second ringed coin 70.
  • the first coin 68 includes an inner portion A formed of Copper (Cu) and an outer portion B formed of Nickel (Ni).
  • the second coin 70 includes an inner portion A' formed of Ni and an outer portion B' formed of Cu.
  • the coins have similar metallic content, although the location of the particular metals is reversed.
  • the optical size of the first coin 68 is the same as the optical size of the second coin 70, both D1.
  • the magnetic size time for the first coin 68 will be longer than the magnetic size time for the second coin 70. Accordingly, the magnetic to optical size ratio of the first coin 68 will be different than the magnetic to optical size ratio of the second coin 70 and the coin detection device 20 will be able to distinguish between the first coin 68 and the second coin 70.
  • Fig. 6 illustrates a sequence of processing steps which could be programmed into processing means 22.
  • the particular processing steps shown would be utilized with the sensor configuration shown in Fig. 1, where the coil 14 is located intermediate the optical sensors 10 and 12.
  • the processing steps illustrated in Fig. 6 implement an optical size time based on positions six (6) and one (1) of the coin 18. It is understood that other processing steps could be utilized and that numerous routines could be incorporated into each processing step depending upon the particular sensor configuration of the coin detection device and also depending upon the optical size time which is being implemented.
  • step 102 The sequence starts at 100 and moves to step 102.
  • step 102 When the coin reaches position one (1), see Fig. 1, the optical coupling of the first optical sensor is blocked and the signal sent to the processing means 22 along line 40, see Fig. 4, goes LO and processing moves to step 104 where time t 1 is set.
  • decision step 106 is satisfied and time t 3 is set at step 108.
  • decision step 110 is no longer satisfied and time t 4 is set at step 112.
  • decision step 114 is satisfied and processing moves to step 116.
  • step 116 When the coin reaches position six (6), decision step 116 is satisfied and time t 6 is set at step 118.
  • step 120 the magnetic size time (MAG T ) is determined and at step 122 the optical size time (OPT T ) is determined.
  • the magnetic to optical size ratio is then determined at step 124 and at step 126 the magnetic to optical size ratio is evaluated to see if it satisfies predetermined criteria of a valid coin type. Processing then ends at step 128.
  • the optical detection means 24, field generating means 26 and detector means 28 could include numerous known constructions common to existing coin detection devices.
  • the field generating means could include a driving coil 72 as illustrated in Fig. 7 while the detector means could include an associated sensing coil 74 in which a voltage V I is induced by the generated field.
  • the level of interaction of the coin with the field of the driving coil 72 would be indicated by changes in the voltage V I induced in the sensing coil 74.
  • the optical detection means could be a single optical sensor 76 such as that illustrated within the coil 78 of Fig. 8, the coil 78 being wound on a core within which the optical sensor 76 is located.
  • the optical sensor 76 could also be located to one side of the coil 78.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Coins (AREA)
EP96116175A 1995-11-21 1996-10-09 Dispositif de contrÔle de pièces de monnaie et méthode associée Withdrawn EP0775989A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US551866 1995-11-21
US08/551,866 US5673781A (en) 1995-11-21 1995-11-21 Coin detection device and associated method

Publications (2)

Publication Number Publication Date
EP0775989A2 true EP0775989A2 (fr) 1997-05-28
EP0775989A3 EP0775989A3 (fr) 1998-11-25

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EP96116175A Withdrawn EP0775989A3 (fr) 1995-11-21 1996-10-09 Dispositif de contrÔle de pièces de monnaie et méthode associée

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US (1) US5673781A (fr)
EP (1) EP0775989A3 (fr)
AR (1) AR003591A1 (fr)
AU (1) AU700627B2 (fr)
CA (1) CA2184147C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711694U1 (de) * 1997-07-03 1997-09-18 National Rejectors, Inc. Gmbh, 21614 Buxtehude Optischer Sensor in Münzprüfanordnungen
US6230870B1 (en) 2000-02-10 2001-05-15 Coin Acceptors, Inc. Coin detection device
EP1160741A2 (fr) * 2000-05-04 2001-12-05 Vesiel S.p.A. Appareil de reconnaissance de pièces et équivalents
EP1777662A1 (fr) * 2005-10-24 2007-04-25 Asahi Seiko Co. Ltd. Dispositif de manipulation de jeton

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001175912A (ja) * 1999-12-21 2001-06-29 Laurel Bank Mach Co Ltd 硬貨判別装置
ATE357680T1 (de) 2000-10-07 2007-04-15 David Dickerson Informationssystem und verfahren zur zurverfügungstellen von informationen unter verwendung eines holographischen elements
JP4334192B2 (ja) * 2002-08-22 2009-09-30 ローレル精機株式会社 硬貨処理機
WO2012015984A2 (fr) * 2010-07-27 2012-02-02 Coin Acceptors, Inc. Dispositif de détection
JP6425878B2 (ja) * 2013-10-18 2018-11-21 株式会社日本コンラックス 硬貨処理装置
CN111325899A (zh) * 2020-02-27 2020-06-23 深圳怡化电脑股份有限公司 纸币位置的检测系统及方法

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US4749074A (en) * 1985-10-11 1988-06-07 Matsushita Electric Industrial Co., Ltd. Coin sorting apparatus with reference value correction system
EP0295610A2 (fr) * 1987-06-15 1988-12-21 Coin Acceptors, Inc. Moyens pour l'examen de pièces de monnaie
US5236071A (en) * 1989-10-23 1993-08-17 Samsung Electronics Co., Ltd. Apparatus for detecting coins and method thereof
US5263566A (en) * 1991-04-10 1993-11-23 Matsushita Electric Industrial Co., Ltd. Coin discriminating apparatus
US5460256A (en) * 1994-03-31 1995-10-24 Coin Acceptors, Inc. Coin sensor device

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JPH01224890A (ja) * 1988-03-04 1989-09-07 Sanden Corp 硬貨識別装置
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Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US4667093A (en) * 1983-02-25 1987-05-19 Macdonald J Randall Electronic coin measurement apparatus with size and acceleration detection
US4749074A (en) * 1985-10-11 1988-06-07 Matsushita Electric Industrial Co., Ltd. Coin sorting apparatus with reference value correction system
EP0295610A2 (fr) * 1987-06-15 1988-12-21 Coin Acceptors, Inc. Moyens pour l'examen de pièces de monnaie
US5236071A (en) * 1989-10-23 1993-08-17 Samsung Electronics Co., Ltd. Apparatus for detecting coins and method thereof
US5263566A (en) * 1991-04-10 1993-11-23 Matsushita Electric Industrial Co., Ltd. Coin discriminating apparatus
US5460256A (en) * 1994-03-31 1995-10-24 Coin Acceptors, Inc. Coin sensor device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711694U1 (de) * 1997-07-03 1997-09-18 National Rejectors, Inc. Gmbh, 21614 Buxtehude Optischer Sensor in Münzprüfanordnungen
US6230870B1 (en) 2000-02-10 2001-05-15 Coin Acceptors, Inc. Coin detection device
EP1126420A3 (fr) * 2000-02-10 2003-11-19 Coin Acceptors, Inc. Dispositif pour détection de pièces de monnaie
EP1160741A2 (fr) * 2000-05-04 2001-12-05 Vesiel S.p.A. Appareil de reconnaissance de pièces et équivalents
EP1160741A3 (fr) * 2000-05-04 2003-01-29 Vesiel S.p.A. Appareil de reconnaissance de pièces et équivalents
EP1777662A1 (fr) * 2005-10-24 2007-04-25 Asahi Seiko Co. Ltd. Dispositif de manipulation de jeton

Also Published As

Publication number Publication date
AU7174396A (en) 1997-05-29
MX9605712A (es) 1997-09-30
CA2184147A1 (fr) 1997-05-22
AU700627B2 (en) 1999-01-07
AR003591A1 (es) 1998-08-05
CA2184147C (fr) 2001-10-16
EP0775989A3 (fr) 1998-11-25
US5673781A (en) 1997-10-07

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